/*
 * Copyright (c) 2011 Imre Fazekas.
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the Brillien nor the names of its
 * terms and concepts may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package com.vii.brillien.ignition.transport;

import java.util.concurrent.ConcurrentHashMap;

/**
 * Communication caching to accelerate API calls
 */
public class BrillienCache {

    private static ConcurrentHashMap<String, ConcurrentHashMap<String,ConcurrentHashMap<String,BrillienCommunication>>>   apiCache;


    static {
        apiCache            = new ConcurrentHashMap<String, ConcurrentHashMap<String,ConcurrentHashMap<String,BrillienCommunication>>>();
    }


    public static <C extends BrillienCommunication> C getCachedResponse(String to, String message, String serviceName){
        if( apiCache.containsKey(to) ){
            ConcurrentHashMap<String,ConcurrentHashMap<String,BrillienCommunication>> mcache = apiCache.get(to);
            if( mcache.containsKey(message) ){
                ConcurrentHashMap<String,BrillienCommunication> scache = mcache.get(message);
                return (C)scache.get("serviceName");
            }
        }
        return null;
    }

    public static <C extends BrillienCommunication> C cacheResponse(String to, String message, String serviceName, C response){
        if( !apiCache.containsKey(to) ) apiCache.put(to, new ConcurrentHashMap<String,ConcurrentHashMap<String,BrillienCommunication>>() );

        ConcurrentHashMap<String,ConcurrentHashMap<String,BrillienCommunication>> mcache = apiCache.get(to);

        if( !mcache.containsKey(message) ) mcache.put(message, new ConcurrentHashMap<String,BrillienCommunication>() );

        ConcurrentHashMap<String,BrillienCommunication> scache = mcache.get(message);

        if( !scache.containsKey(serviceName) ) scache.put( serviceName, response );

        return response;
    }

}
